160 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 13 



ASCLEPIAS CURASSAVICA L., Sp. PL 215. 1753. 



Puerto Escondido, February 11, Dawson 1087. 



Widely distributed in the tropics and subtropics of America. It is a 

 mesophyte found only along stream banks or wastelands of irrigated 

 fields in Baja California. It is an erect perennial herb or strictly branched 

 bush with showy heads of reddish orange flowers. 



AscLEPiAS SUBULATA Decne. in DC, Prodr. 8:571. 1844. 



Guaymas, January 23, Dawson 1101. San Jose del Cabo, February 

 17, Dazvson 1156. Found throughout the desert of the California Gulf 

 Region, mostly along arroyos and canyon bottoms in sandy or gravelly 

 soil ; type from "Nova Hispania." This and A. albicans are perennial 

 herbs with several to many rush-like stems 1 to 2 m tall, bearing remote 

 filiform leaves for short periods in the rainy seasons, the terminal pani- 

 culate white and yellowish flowers often outlasting the ephemeral leaves. 

 The flowers are greedily visited by many species of wasps and flies. 



CONVOLVULACEAE 



EvoLVULUs LiNiFOLiA L., Sp. PI. ed. II :392. 

 San Jose del Cabo, Baja California, February 17, Dawson 1188. 

 Sonora and Baja California. Distinguished from the more widely 

 spread E. aisinoides by the narrower leaves and smaller flowers. 



Jacquemontia abutiloides Benth., Bot. Voy. Sulph. 34. 1844. 



Puerto Escondido, February 11, Dawson 1093; March 13, Rempel 

 148. Punta Frailes, February 16, Dawson 1126. San Jose del Cabo, 

 February 17, Dawson 1162, 1186. 



Southern Sonora and middle and southern Baja California; type 

 from Magdalena Bay, Baja California. 



Hydrophyllaceae 



Phacelia scariosa Brge., Proc. Calif. Acad. Sci. II, 2:185. 1889. 



Puerto Escondido, February 11, Dawson 1103; March 13, Rempel 

 150. Tortuga Island, March 17, Rempel 205. 



Southern Baja California and adjacent islands including Tortuga 

 and Carmen in the gulf ; type from Magdalena Island on the outer coast. 



Boraginaceae 



Bourreria sonorae S. Wats., Proc. Am. Acad. Sci. 24:62. 1889. 



San Jose del Cabo, February 17, Dawson 1208. 



Baja California and Sonora, type from Guaj^mas, Sonora. It is a 

 shrub 1 to 2 m tall scattered in the coarse soils of the less arid localities. 



